src/video/x11/SDL_x11mouse.c
author Szymon Wilczek <kazeuser@gmail.com>
Tue, 05 Aug 2008 14:18:40 +0000
branchgsoc2008_manymouse
changeset 3775 e5011833348a
parent 3772 9087a84cba51
child 3777 54d08ecec1cb
permissions -rw-r--r--
Linux update

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#include "SDL_x11video.h"

#include "../../events/SDL_mouse_c.h"

void
X11_InitMouse(_THIS)
{
    extern XDevice **SDL_XDevices;
    XDevice **newDevices;
    int i,j,index=0, numOfDevices;
    extern int SDL_NumOfXDevices;
    XDeviceInfo *DevList;
    XAnyClassPtr deviceClass;
    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;

    /*we're getting the list of input devices*/
    DevList=XListInputDevices(data->display, &numOfDevices);
    SDL_XDevices=(XDevice**) SDL_malloc(sizeof(XDevice));

    /*we're aquiring valuators:mices, tablets, etc.*/
    for(i=0;i<numOfDevices;++i)
    {
        /*if it's the core pointer or core keyborard we don't want it*/
        if((DevList[i].use!=IsXPointer && DevList[i].use!=IsXKeyboard))
        {
            /*we have to check all of the device classes*/
            deviceClass=DevList[i].inputclassinfo;
            for(j=0;j<DevList[i].num_classes;++j)
            {
                if(deviceClass->class==ValuatorClass)/*bingo;)*/
                {
                    XValuatorInfo* valInfo;
                    SDL_Mouse mouse;

                    newDevices= (XDevice**) SDL_realloc(SDL_XDevices, (index+1)*sizeof(*newDevices));
                    if(!newDevices)
                    {
                        SDL_OutOfMemory();
                        return -1;
                    }
                    SDL_XDevices=newDevices;
                    SDL_XDevices[index]=XOpenDevice(data->display,DevList[i].id);
                    SDL_zero(mouse);

                    /*the id of the device differs from its index
                     *so we're assigning the index of a device to it's id*/
                    SDL_SetIndexId(DevList[i].id,index);
                    /*lets get the device parameters*/
                    valInfo=(XValuatorInfo*)deviceClass;
                    /*if the device reports pressure, lets check it parameteres*/
                    if(valInfo->num_axes>2)
                    {
                        data->mouse = SDL_AddMouse(&mouse, index++,DevList[i].name,valInfo->axes[2].max_value,valInfo->axes[2].min_value,1);
                    }
                    else
                    {
                         data->mouse = SDL_AddMouse(&mouse, index++,DevList[i].name,0,0,1);
                    }
                    break;
                }
                /*if it's not class we're interested in, lets go further*/
                deviceClass=(XAnyClassPtr)((char*)deviceClass + deviceClass->length);
            }
        }
    }
    XFreeDeviceList(DevList);
    
    SDL_NumOfXDevices=index;
}

void
X11_QuitMouse(_THIS)
{
    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;

    /*Lets delete all of the mice*/
    SDL_MouseQuit();
}

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